Markey Wants Mobile Carriers' Police Tracking Data

Law360, New York (May 3, 2012, 8:28 PM EDT) -- Sen. Ed Markey, D-Mass., on Thursday urged AT&T Inc. and eight other major wireless carriers to reveal their methods for sharing customers' cellphone information with police, citing widespread privacy and constitutional concerns over the transfer of this information without a warrant.

In the wake of recent reports highlighting an increase in requests from law enforcement agencies for mobile phone customer information without proper judicial oversight, Markey — co-chair of the Congressional Bipartisan Privacy Caucus — sent letters to the nine mobile carriers questioning them about their...